Improvement in subsoil attachments for plows



ALBERT FRQBERTS Subsnil A't'rachment Fon Flows.

198939 PATENTE Nov 11870A afl 1% il I anni (tinte ALBERT F. ROBERTS, OF LEXINGTON, KIN'IUVOKY. I

Letters Patent No. 108,939, dated November 1 1870.

IMPROVEMENT IN SUBSOIL ATTACHNlENTS FIOR PLOWS.

The 4Schedule referred to in these Letters Patent and making part of the same.

To all whom it may concern Be it known that I, ALBERI' F. Roannais, of the city of Lexington, county of Fayette and State of Kentucky, have invented a new and useful Improvement in Subsoiling-Attaehments for llows, ot' which the following is a description, reference being had to the accompanying drawing.

Notare and Objects of tllc lwcntoil.

The invention relates to that class of subsoil-attachnients for plows of all descriptions which has for its object the loosening or pulverizing of the soil at a poillt below the surface of the bottom of the furrow.

This object is elected by the preselit invention by means of a standard, secured to the rear end oi' the beam of aplow, which can be lowered or elevatedby a slot alid sliding bolt. v'lo the lowel` end of the standard is atlixed a pointed convex shovel, immedi :itely under the longitudinal center of wllicli, and running to itspoint, is secured the foot of the standard. Directly ill front of the fi'olit edge of the standard, alid secured thereto, is a coller, being a portion of the standard itself, though partially divided' therefrom. standard increases-until the colter reaches the poilit where it is secured to the shovel, at or about the cellter of its upper surface. This colter terminates ill a foot secured to the center of the shovel, infront of tliejunction of the colter therewitll, and terminates ill a broad, sharp point, somewhat beyond the poilit of the sllovel, where it is secured to that portion of thc foot of thc standard on the underside of the shovel.

Description of the Accompanying Dran-ing.

Figure Lis a side elevation of the illvelitioli.

Figure 2 is aview oi" the lower surface ofthe shovel.

liigurc is a view of the slotted strap and bolt, showing the means ol' attaching the standard to the beam ot' the plow, the dotted lilies 'indicating the nut, with level' and sliding plate.

General Description.

A in the acconipanyilig drawing represents the slotted strap secured to the side of'tllc rear end of thc beam oi' a plow, Z, on the right or left side, according as the plow is right-handed ollel`t-haiided, by moans of bolts through the apertures a: and y.

Through thc longitudinal center of the elevated portion ot' A rulis a slot, B, the interior of the upper surface of which is provided with rectangular .projections, in, the distances between wllich and between either thereof, and the ends of the slot on cach side, slightly exceeds the length of the shoulder iv on lthe set-screw C.

The set-screw O is provided with a head of such The distance separating tllese parts ot' the.

dimensions' :is to prevent it passing tlirougll the slot B Ilnniediatelyili front of this head is the shoulder it', that part of wllich, opposite the head ,when in positioii, is flush with the exterior surface of the stl'ap A From the centclxof this shoulder projects a screw, passing through the slot 1) iii the standard E, and through a sliding plate, F, the sides of which lap over and slide upon the edges of the'standard, where it is inserted through a lint, H, provided with an ear or lever, l, by means of which the tension of the screw is regulated.

The standard E is provided, at its longitudinal celitor, with a slot, D, of requisite length.

A part ot' the lower portion, E', of the standard is curved under, alld securely riveted to the under side of the convex shovel L, the part thus secured heilig drawn ont so as to lio firmly attachet. llle front end of this part passes beyond the pointof the shovel and below it.

The standard E heilig divided through the lower portion of its center at' the point X, the part E is incliiled forward, its front edge beingdrawn sharp,it's

rear coming in Contact with the upper surface ot' the shovel L at the' point Y.

- The part is drawn out, ill a reverse direction to its edge, into a foot, It, which projects along the ceiltral lille of alid beyond the poilit of the shovel L.

'lllc foot lt and the forward end of the portion E', ou thc underside of the shovel, are secured together by welding or otherwise.

Therest of the portioils E' E", on the lower and upper surfaces of the shovel, are secured together by bolts, s and t, which pass also through the shovel.

The shovel is' convex and triangular, being sharpeiied at its sides and point, which is ill front, its rear side being at lateral right angles to the poi'tioil E' of the standard lil.

Over the rear of the standard E, at a properheigllt the front end ot' which is secured rigidly toa bolt in the share of the plow.

Operation. 'lllc attachment heilig secured to one side of the rear of the beam of the plow by means of screws or bolts through the apertures x and l in such position that the standard E projects vertically downward and the point of thc shovel L is ill front, the plow alid attachment aro really for operation.

`XVhen it is desired to increase the depth of the slibsoiliiig, ille set-screw C is loosened by nicaus of the lever I, whereupon the standard lll slides downward upon the screw in the slot AD, and lnay be adjusted as desired by tightening thc screw O.

In light and loalny soils the pitch of thc shovel L' above the shovel, passes the loop of a draw-bar, N, l

should be less than in heavy, grnvelly, :uid stony ground. fixen itis desired to increase the pitch of the shovel, the set-screw0 is loosened sutiieicntly to nllow the shoulder w, toibo cleared ot' the projections l1n or ends of the slot',` B. The zlt-tnelnnent is then moved forward, nud the shoulder w introduced hetween others ot' the rectangular projections 111,:1nd the set-screw O then tightened. The further forward the standard is moved and secured, the greater will he thepiteh ot' the shovel l).

Claims.

Winn; l elninx ns my invention, :nid desire to secure bv Letters Patent, is` l.. The standard E, composed of' the portion E',:1t tnehed to the shovel L, and the portion E", constitiltingr the eoltcr, with the foot; R, with the adjustwww f, v.

nient: composed of the slotted strop A, provided with the projections nl, set-screw U, plate F, and nul: Il, substantially tor the uses and purposes shown and set forth.

2. In :L plow, eultivntor, or snhsoil attachment, the device A, provided `with the projections m, for the uses and purposes described and shown.

In testimony that; I claim the Ioregoing improvenlcnt; iu snbsoil attachments for pious, os above dcscribed, I have hereunto set iny Vlmnd this 11th doy of October,1870.

ALBERT F. ROBERTS.

Witnesses: i

EDM. F. Bnowx. Dnxms TiNxnY. 

